Duplicator feeding and aligning device



5 Sheets-Sheet 1 L. J. SAUER Filed Oct. 6, 1930 DUPLICAIOR FEEDING AND ALIGNING DEVICE Aug. 2, 1932.

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Law's JXS dZIGZ' Patented Aug. 2, 1932 v UHTED STATES PATENT ol-"rice LOUIS J. SAUER, OF OAK PARK, ILLINOIS, ASSIGNOR TO CHARLES H. JOY, SR., OF

CHICAGO, ILLINOIS DUPLICATOR FEEDING .AND ALIGNING DEVICE Application filed October 6,

" that shown and described in my copending application, Serial No. 349,876, filed March 25, 1929, in which paper or suitable cards are inserted in the carriage and the platen roller impresses the original or the copy sheet on the gelatinized surface, which latter receives the impression from the original sheet and transfers it to the copy sheet.

In positioning the original or the copy sheets on the gelatinized surface, it is necessary that the paper be accurately aligned with relation to the platen roller and the printing surface and that the sheets be fed to the gelatinized surface and under the platen roller in such a manner that a suitable margin will result. It is also desirable that means be provided whereby the original may be impressed on the printing surface in any suitable longitudinal position and that large numbers of copy sheets of various thicknesses may. thereafter be fed into the machine and automatically positioned relative to the printing surface to provide the same margin on all of the copies regardless of the difference in thickness. Heretofore, machines of this type have been unsatisfactory and unreliable and required a separate and careful adjustment for each thickness of paper in order to retain the same margin; also, when previous methods are used and stiff cards or paper are inserted in the machine, the sharp edge of the paper causes injury to the gelatin printing surface.

In my invention, I have overcome the above and other objections and have provided an accurate and convenient means for feeding.

paper or comparatively stiff cards to the printing bed in such a manner that there is no tendency to injurethe gelatin surface, and V have also provided an automatic aligning means for accurately aligning the paper with 1930. Serial No. 486,608.

the impression on the printing bed in such a manner as to provide the same registration theieonregardless of the thickness of paper use The embodiment of my invention, which will be later described in detail, contemplates. aduplicating machine having a carriage for movement back and forth over a printing bed, and in which carriage is mounted the usual platen roller, which latter is automatically lowered and raised by the lost motion of the carriage handle during the rest periods of the carriage and preparatory to reversing the movement thereof.

While the platen roller is in the raised position, paper, or a suitable card, is inserted between the platen roller and a yieldable pressure roller where it engages and is aligned by a rotary margin bar arranged to rotate about the platen roller. The handle is then operated preparatory to moving the carriage to complete the printing operation, and the lost motion of the carriage handle simultaneously lowers the platen roller and rotates the margin bar to carry the paper around the platen roller and into parallel alignment with the printing surface, the platen roller being locked during a portion of its downward movement so as to feed the paper by engagement with the yieldable pressure roller.

The rotary margin bar moves somewhat faster than the paper is fed, and, therefore, the paper will be released therefrom as soon as it is in parallel alignment with the printing surface, and the margin bar will continue its rotation to a position to allow the final part of the downward movement of the platen roller to press the paper snugly against theprinting surface. a

An especially desirable feature of the present invention comprises a completely automatic-margin controlling paper feed mechanism, whereby paper or cards, varying greatly in thickness, may be automatically delivered to the gelatinized surface to provide the same margin regardless of the thickness of the paper.

The invention also includes a completely automatic platen clutch mechanism, whereby W" the platen may be locked during a portion of its downward movement.

A further feature is the provision of a completely automatic margin-controlling paper feed and a suitable margin bar paper guide cooperating therewith, all incorporated in the carriage of the duplicating machine and automatically operable by the single means operating the carriage.

I also provide means whereby the paperfeeding operation is completed before the movement of the carriage begins and where--- in the paper-feeding operation for maintaining the same margin on paper of different thickness is controlled by the same directional movement of the handle controlling the carriage.

My invention also includes a rotary margin bar and paper-aligning means cooperatmg with an automatic platen control which will automatically guide the paper into parallel aligned relation with the printing surface, thereby preventing injury to the gelatin when the paper is delivered to the surface and will align the pa er to provide the same margin on thiclr or t paper.

Further objects will appear from the detailed description and the appended claims.

In the drawings:

Figure 1 is a top plan view of a portion of a duplicating machine in which one embodiment of my invention is illustrated;

Fig. 2 is an elevation of the guide rod end of the carriage, the platen and a portion of the operating mechanism being shown in dotted lines;

Fig. 3 is a transverse sectional view through the opposite end of th carriage, taken on a line corresponding to line 3-3 of Fig. 1;

Fig. 4 is a transverse sectional view through the carriage, taken on a line corresponding to line 4-4t of Fig. 1, with the mechanism shown in position after the platen has been moved into contact with the gelatinized surface;

Fig. 5 is a transverse sectional view simi lar to that shown in Fig. 4, with the operating parts in raised position.

Fl g. 6 is a sectional detailed view through the platen roller bearing and supporting mechanism, taken on a line corresponding to line 66 of Fig. 4;;

Fig. 7 is a detailed perspective view of the platen clutch and platen roller bearing;

Fig. 8 is a detailed perspective view of the pressure roller connecting link;

Fig. 9 is a perspective view of one end of the margin bar and stop link pivoted thereon;

Fig. 10 is a detailed perspective view of the pressure roller bearing;

Fig. 11 is a transverse sectional view through the platen roller and clutch, taken on a line corresponding to line l111 of Fig. 6;

Fig. 12 is a diagrammatic view illustrating the relative positions of the operating parts during the paper feeding operation; and

Fig. 13 is an enlarged diagrammatic view illustrating the locking point of the platen roller to provide the same margin on thick or thin paper.

Referring to the drawings in detail, the embodiment illustrated comprises a duplicating machine having side frame members 1 and 2 on which is supported a bed plate 3 having a gelatinized printing surface l thereon. The gela-tinized surface usually comprises a band or ribbon which is wound on spools mounted at each end of the machine and by which the ribbon may be moved over the printing bed and secured in any desired position thereon, and then may be wound from one spool to another and stretched over the printing bed to provide a new printing surface. The spools are not shown as they form no part of the present invention.

A carriage 5 is supported for longitudinal movement over the printing bed and comprises a rectangular frame 6, which is preferably of comparatively heavy sheet metal, having a downwardly extending bracket 7 provided with outwardly extending bearings 8. These bearings are formed around a bearing guide rod 9 which latter is longitudinally supported adjacent a side frame member 1. The alignment of the rod 9 provides for the accurate movement of the carriage baclz and forth over the printing bed, and the bearings 8 thereon also allow the carriage to be raised from the printing surface by rotation on the guide rod. The opposits end of the carriage is supported on the side frame 2 by means of a roller 10 which is pivoted on the end plate of the carriage."

By this construction the carriage may be moved back and forth over the printing surface or raised for inspection of the gelatin. Adjustable stops 11 on the guide rod 9 limit the movement of the carriage as desired. A rock shaft 12 is pivotally mounted in the carriage end plates by means of suitable bearing screws 13 and is provided with arms 14? and 15 secured thereto for supporting a platen roller 16.

The platen roller is provided at each end with reduced shaft extensions, as indicated at 17 in Fig. 6. A hearing hole 18 in the rock shaft arm 1a is arranged to receive one of the platen roller shaft extensions 17 and to provide a bearing therefor and the platen roller shaft extension 17a on the opposite end of the platen is mounted in an open bearing slot 19 in the arm 15. as shown in Fig. The arm 15 is provided with an arcuate surface 20 which is in alignment with a similar arcuate surface on a retaining member 21 secured to the end of the carriage. By this construction, it will be obvious that when the rock shaft is operated to raise and lower the platen, the shaft extension 17a willbe retained in the bearing slot 19 by means of thearcuate retaining member 21 during the normal movement of the platen roller. In Fig. 3 the arm 15 is illustrated in its normal raised position. Y

When it is desired to remove the platen roller it is only necessary to rotate the rock shaft 12 to raise the platen roll-er until the roller shaft extension 17 a is above the surface the carriage, whereby the carriage may be moved over the printing surface and the lost motion will automatically raise and lower the platen. It is desirable that the platen roller should be locked in its downward position when pressed against the gelatinized surface. In order to accomplish this, I provide a locking means comprising a shaft 24 rotatably mounted in the handle 23 and extending through and having a bearingin the arm 14. A portion of the shaft is cut away flush with the side of the arm 14, as shown at 25, the protruding portion 26 forming a latch extending through a slot 27 in the carriage frame and in a position to engage in a notch 28 therein when the platen is in the lowered position. I

The portion 26 provides a latch which is normally held in engagement with the notch 28 by means of a torsion spring 29, one end of which is secured to the handle 23 and the other end to the shaft 24. An arm 30 is secured to the shaft 24 and provides a trigger,

sired to raise the platen roller above the normal operating position in order that the platen may be removed from the carriage, it

is only necessary to raise the pawl 31, thereby allowing a greater movement of the handle and rock shaft and allowing the platen to be easily removed.

The platen roller bearing arm 14 is provided adjacent the platen bearing with radially disposed inwardly extending lugs 33, and the arm 15 is provided with similar lugs 34 adjacent the bearing slot 19. These lugs extend into the slotted openings 85 in suit able pressure roller links 36 and provide a portion of the bearing therefor. .A rotary margin bar 37 comprises a curved sheet metal plate 38 having end plates 39 with outwardly extending bearing lugs 40 which latter also extend into the slotted link openings 35 to complete the bearing therefor. The margin bar end plates are provided with slots 41 in which the platen roller reduced shaft eX- tensions 17 and 17a are engaged, the margin bar being mounted for independent rotation in the pressure roller links 36 by means of the bearing lugs 40. The margin bar is rotatably supported in thelinks 36 and rotates around platen roller shaft extensions 17 and rl'lawhich are engaged in the slots 41, the rotation being caused by the tumbler links 42,

one end of each link being pivoted to the margin bar at 43 andthe opposite end piv oted on the carriage frame at 44. A rearwardly extending portion 45 forms a stop for engagement with the rock shaft 12 when the mechanism is in the position shown in Figs. 3 and 5, the margin bar and cooper ating parts being retained rigidly in the raised position shown by engagement of the end plates 39 with pins 46 on the pressure roller connecting links 36.

' A pressure roller 47 is provided with re duced bearing portions 48 which are engaged in the elongated holes 49 in the links 36. The

pressure roller is supported in bushings 50 on the shaft extensions 51. These bushings extend through elongated slots 52 in the ends of the carriage and are provided with grooved flanges- 53, against which springs 54 are engaged to provide a yielding pressure of the pressure roller against the platen, the elongated holes 49 allowing a slight movement of the pressure roller when engaged by the platen roller and to allow for different thicknesses of paper. An inclined'p'aper table 55 is secured to the frame substantially in alignment withthe pressure roller. The margin bar is provided with a shoulder 56 and a forwardly extending flange 57 to receive and engage a card or paper 58 when it is inserted between the platen roller and the pressure roller, as shown in Fig. 12.

It will be noted that when the platen roller is raised from the lowered position shown in Fig. 4 to the position shown in Fig. 5, the lugs 33 and 34 on the arms 14 and 15, respectively, will be brought into alignment with the restricted portion 59 of the slotted o enin 35 in the pressure roller link 36 P e a and the platen roller will be raised out of axial alignment with the margin bar, as

shown in Fig. 5. Simultaneously the link 36 will be raised and the margin bar will be rotated by the tumbler link 42 to allow the reduced platen .roller shaft extensions to pass upwardly through the slots 41 in the margin bar end plates. All of the margin bar mecha- -When paper is inserted between the raised platen roller and the pressure roller, it will be engaged against the margin bar, and the handle 23 is then moved forward to lower the platen roller and engage the paper against the pressure roller, the margin bar remaining in raised rigid position until the platen roller is lowered into axial alignment therewith.

In order to provide an automatic means for locking the platen roller during the time that the paper is engaged, I provide clutch mechanism comprising an arcuate arm 60 pivoted at 61 on the platen roller supporting arm 14. Rollers 62 and 63 are pivoted on the end frame of the carriage and arranged to engage a lug 64 on the arc ate clutch arm 60 to release the clutch. A. spring 65 is se-- cured on the arm ll at 66 and engages a rearwardly extending arm 67 on the clutch member to normally retain the clutch in engaged position. The arm 60 is provided with an outwardly extending clutch portion 68 having lugs 69 thereon. These lugs are arranged to engage an outwardly extending flange 70 on the platen roller when the lug 64 is not in engagement with either of the rollers 62 or 63. It will be evident that when the portion 64 of the clutch arm is in engagement with either of the rollers 62 or 63 the platen roller will be free to rotate, and when the platen roller is raised to a position to release the clutch arm the spring 65 will cause the platen roller flange 70 to be engaged between the lugs 69 and the platen roller will be held rigidly against rotation. lVhen the handle 23 is operated to raise the platen roller beyond the normal raised position so that it.

may be removed from the carriage, the end of the clutch arm 67 engages a pin 67a (A 1g. 5) on the end of the carriage frame 6, thereby retaining the clutch in disengaged position and allowing the platen roller to be easily removed.

In order that paper of different thicknesses may be used in such a manner as to provide the same margin and to accurately align on the gelatinized surface in the same position relative to the platen roller, it is desirable that the plat-en roller should look against rotation at the point at which it will engage the thinnest paper ordinarily used in the machine. This is illustrated in Fig. 13 in which a very thin paper is indicated by the full lines A and a very thick sheet of paper is indicated by the dotted lines B. It will be obvious from Fig. 13 that if the platen roller 16 is locked by means ofthe clutch just described immediately upon its engagement with the thin paper A the paper,

will be fed downwardly during the further .locked downward movement of the platen roller and the platen roller clutch will be released to prevent further feeding movement of the paper as soon as the paper has been carried by the margin bar around the platen roller to a position where lb is substantially parallel with the gelatinized surface. It will'then be released and the margin obtained on all papers of similar thickness or of different thicknesses will be the same. In order to automatically provide the same margin on very thick paper, as indicated by the dotted lines B, the platen roller locking adjustment need not be changed but the platen roller will be free to rotate and roll on the thick paper until it has reached the same I point as the point of engagement with the thin paper. At tiiis point the platen roller will be locked and obviously the thick paper will then be fed to exactly the same relative position and will be aligned on the gelatinized surface in exactlythe same marginal relation as the thin paper.

In practice, the rotating margin bar passes ve y close to the gelatinized printing surface, thereby carryingthe paper into adjacent parallel relation to the surface, so that when it is released it does not strike the surface at an angle thereto. In the drawings the space between the margin bar and the gelatinized surrace has been exaggerated for purposes of illustration.

VJhile I have described but one embodiment of my invention, it will be obvious that modifications may be made without departing from the spirit of the invention, and I desi e, therefore, to be limited only by the scope of the prior art and the appended claims. Having thus described my invention, what I claim and desire to secure by Letters Patent is:

1. A device of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said carriage and movable to and from said bed, a pressure roller, a movable margin bar, and automatically movable means for controlling the operation of said platen roller during its to and from movement in a manner to cause the cooperative action of said rollers to feed sheets of different thickness to the same marginal position on said bed.

2. A device of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said. carriage and movable to and from said bed, a pressure roller, a movable margin bar, and an automatically operable clutch for engaging and controlling the rotation of said platen roller during its to and from movement to cause the cooperative action of said rollers independent of said margin bar 'to feed sheets of different thickness to the same marginal position on said bed.

3. A devme of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said carriage and movable to and from said bed, a pressure roller, a movable margin bar, and automatic means for locking and bed.

-margin bar pivoted in substantially axial alignment with said platen roller and automatically operable means for controlling the operation of said platen roller during its movement toward said bed to cause the cooperative action of said rollers independent of said margin bar to feed sheets of different thickness into the same marginal alignment on said bed.

5. A device of the character described comprising a printing bed, a platen roller arranged to travel over said bed, a rotatable margin bar pivoted substantially in axial alignment with said platen roller, means for moving said platen roller and said margin bar to and from said bed and simultaneously changing their positions relative to each other, a pressure means, and automatic means for controlling the cooperative action between said platen roller and pressure means to feed sheets of different thickness therebetween to the same marginal position under said platen roller.

6. A duplicator otthe character described comprising a printing bed, a platen roller arranged to travel over said-bed, a rotatable margin bar pivoted substantially in axial alignment with said platen. roller, means for moving said platen roller and said margin bar to and from said bed and simultaneously changing their axial relation, a pressure means, means for automatically controlling the cooperative action of said platen roller and said pressure means to feed sheets of different thickness therebetween to the same marginal position under said platen roller, and a single lost motion means for controlling all of said operations and moving said platen roller over said bed.

7. A duplicator comprising a printing bed, a carriage arranged to travel over said bed, a platen roller arranged to be raised and lowered to and from said bed, a pressure roller cooperating with said platen roller tofeed paper thereunder during the downward movement of said platen roller, means for preven the rotation of the platen roller during the feeding operation, to feed paper of dif ferent thickness to the same marginal position and to release the platen roller when paper of any thickness within the limits of the machine has been fed to a definite marginal position, means for supporting the fed paper in substantially parallel alignment with said bed and automatically releasing said paper to said bed substantially simultaneously with the release of the platen roller, and single means for moving said carriage and automatically controlling all of said operations.

8. In a duplicating machine, a carriage mounted to travel over a printing bed, a carriage operating handle having a lost motion in the direction. of movement of said carriage, a platen roller arranged to be raised and lowered by the lost motion of said handle. a yieldable pressure roller cooperating with said platen roller to feed paper therebetween during the downward movement of said plat en roller, and automatic means for intermittently locking and unlocking one of said rollers against rotation during each directional lost motion of said handle. V

9. A duplicating machine comprising aprinting bed, acarriage arranged to travel over said bed, a platen roller, means for operating said carriage and for movably supporting said platen roller and having a'lost motion relative to said carriage to raise and lower said platen roller, a rotary margin bar pivoted in axial alignment with said platen roller and arranged to be raised and lowered simultaneously with said platen roller-and having a lost motion therebetween, a yieldable pressure roller connected to said margin bar and having a lost motion'therebetween, and automatic means for coordinating the operations or all of said parts during the downward movement or" said platen roller to feed different thicknesses of paper onto said bed in the same marginal relation.

10. A device of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said carriage and movable to and from said bed, a pressure roller, a movable margin bar for supporting sheets, automatically movable means for controlling the operation of said platen roller during its to and from movement to cause the cooperative action of said rollers to feed sheets of different thickness to the same marginal position on said bed, said margin bar being arranged to prevent the engagement of said sheets with the bed. during the registering movement of said rollers, and manually releasable means to automatically lock said platen roller in'bedengaging position during the movement of the carriage.

'11. A duplicator of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roll er, a rock member for supporting said platen roller and having alimited lost motion relative to said carriage, and means for increasing the lost motion to allow the removal of the platen roller.

12. A duplicator of the character described comprising a printing bed, a carriage S arranged to travel over said bed, a platen roller, a rock member for supporting said platen roller and having a lost motion relative to said carriage, a closed bearing for one end of said roller, an open bearing for the opposite end of said roller, and a retainer for retaining said roller in said open bearing during a limited part of said lost motion.

13. A duplicator of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said carriage and arranged to move to and from said bed, a pressure roller, a rotatable margin bar, and automatic means for controlling the cooperation of said platen roller L and said pressure roller during the downward movement of said platen roller to cause paper of diiferent thicknesses inserted therebetween and supported by said margin bar to register to the same definite alignment on said bed.

14. A device of the character described, comprising a printing bed, a carriage arranged to travel over said bed, a pressure roller, a yoke pivotedon said carriage, a platen roller on said yoke and movable to and from said bed for engagement with said pressure roller, a toggle connection between said pressure roller and said yoke during the engagement of the rollers, said platen roller being substantially in axial alignment with the joint of said toggle during engagement, said toggle being arranged to allow the platen roller to be moved out of axial alignment when said rollers are disengaged.

15. A device of the character described, comprising a printing bed, a carriage arranged to travel over said bed, a pressure roller, a yoke pivoted on said carriage, a platen roller on said yoke and movable to and from said bed for engagement with said pressure roller, a toggle connection between said pressure roller and said yoke during the engagement of the rollers, said platen roller being substantially in axial alignment with the joint of said toggle during engagement, said toggle being arranged to allow the platen roller to be moved out of axial alignment when said rollers are disengaged, a movable margin bar associated with said tog- 1 gle arrangement, and means associated with said margin bar to cause said toggle arrangement to be locked 1n a limited upward position when said platen roller is raised.

16. A device of the character described 1 comprising a printing bed, a carriage arranged to travel over said bed, a platen roller frame pivoted for rocking movement on said carriage, a platen roller on said platen rolle frame and movable therewith, a pressure roller,a link associated with said pressure roller and in engagement with said platen roller in its lower position, said link and said platen roller frame forming a toggle arrangement, means for locking said toggle arrangement in a limited raised position, said roller frame being arranged to raise said platen roller beyond the normally locked up Ward position of said toggle arrangement.

17. A device of the character described comprising a printing bed, a carriage arranged to travel over said bed, a platen roller frame pivoted for rocking movement on said carriage, a platen roller on said platen roller frame and movable therewith, a pressure roller, a link associated with said pressure roller and in engagement with said platen roller in its lower position, said link and said platen roller frame forming a toggle arrangement, means for locking said toggle arrangement and said platen roller in lowered position, and means for interlocking said toggle arrangement in a limited upward position relative to the raised position of said platen roller.

18. A device of the character described, comprising a printing bed, a platen roller arranged to travel over said bed, and a rotatable. margin bar pivoted in substantially axial alignment with said platen roller to receive and align paper on said bed.

19. A device of the character described, comprising a printing bed, a platen roller arranged to travel over said bed, and a rotatable margin bar pivoted in substantially axial alignment with said platen roller and automatically operable to receive and align paper on said bed.

20. A device of the character described, comprising a printing bed, a platen roller arranged to travel over said bed, a margin bar pivoted substantially in axial alignment with said platen roller, means for moving said platen roller to and from said bed while remaining substantially parallel to said bed, and means to rotate said margin bar during the to and from movement of said platen roll- 21. A duplicating machine comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said can riage, a margin bar pivoted substantially in axial alignment with said platen roller, means for moving said platen roller to and from said bed while remaining substantially parallel to said bed, and means to automatically rotate said margin bar in opposite directions during the to and from movement of said platen roller.

2:2. A device of the character described,

comprising a printing bed, a platen roller arranged to travel over said bed, a margin bar pivoted substantially in axial alignment with said platen roller, means for moving said platen roller to and from said bed while remaining substantially parallel to said bed,

' ment with said platen roller, means for aligning and supporting the fed paper in substantially parallel alignment with said bed, and means for automatically releasing said paper to said bed when fed to substantially parallel adjacent position.

24. A duplicator, comprising a printing bed, a carriage arranged to travel over said bed, means for raising and lowering said plat on roller, a pressure roll-er cooperating with said platen roller to feed paper thereunder during the downward movement ofsaid platen roller, means for aligning and supporting the fed paper in substantially parallel alignbed, and automatically rotatable means for releasing said paper to said bed when fed to substantially parallel adjacent position.

25. A duplicatin machine comprising a printing bed, a 'ca'rriage arranged to travel back and forth over said bed, a paper feeding unit on said carriage and comprising a lost motion rock member, a handle for operating said carriage and said rock member, a platen roller on said rock-member for substantially vertical movement relative to'said bed, a yieldable pressure roller forming a part of said unit and arranged for substantially horizontal movement, a rotatable margin bar a ranged for movement around the axis of the platen roller, and means foreperating said margin bar and said platen roller cooperativelyto teed paper to said printing bed in substantially parallel relation.

26. A duplicating machine, comprising a printing bed, a carriage arranged to travel over said bed, a platen roller, means on said carriage for movably supporting said platen roller and having a lost motion relative to said'carriage to raise and lower said platen roller, a rotary margin bar on said movable means and arranged to be raisedand lowered simultaneously with said platen rollerand having a lost motion therebetween;

27. A. duplicating machine, comprising a printing bed, a carriage arranged to travel over said bed, a platen roller, means on said carriage for movablysupporting said platen roller and having a lost motion relative to said carriage to raise and lower said platen roller, a rotary margin bar on said movable member and arranged to be raised and lowered simultaneously with. said platen roller and having'a lost motion therebetween, a yieldable pressure roller, and means cooperating between said pressure roller and said margin bar to limit the upward movement of said bar. 7

28. A duplicating machine, comprising a printing bed, a carriage arranged to travel over said bed, a rock member on said carriage, a handle for. operating said carriage and said rock member to cause a lost motion therebetween, a plat-en roller on said rock member for movement therewith, a margin bar on said rock member for limited move- .ment therewith and rotary movement relative thereto, a pressure roller, and means cooperating with said pressure roller and said margin bar for limiting the upward movement of said margin bar. 7

29. A duplicating machine, comprising a printing bed, a carriage arranged to travel over said bed, a rock member on said carriage, a handle for operating. said carriage and said rock member tocause a lost motion therebetween, a platen roller on said rock member for movementtherewith, a margin bar on said rock member for limited movement therewith and rotary movement relativethereto, a yieldable pressure roller operatively connected With said rock member and yieldable means therebetween to normally retain said platen roller in. printing position. w 30.. Av duplicating machine, comprising a printing bed, a carriage arranged to travel over said bed, a platen roller on said carriage, a margin bar, means for moving said platen roller and said margin bar to and fromsaid bed, and means on said carriage for automatically rotating said margin bar during the upward movement ofsaid bar and said platen roller. p

31. A duplicating machine, comprising a printing-bed, a carriage arranged to travel over said bed, a platen roller on said carriage, a margin bar, means for moving said platen roller and said margin bar to and from said bed, and means on said carriage for automatically rotating said margin bar during the upward movement of said bar and said platen roller and for locking said platen roller against rotation in the raised position.

32. A duplicating machine, comprising a printingbed, a carriage movable'over said bed, a guide rod for said carriage, a platen roller on said carriage, means formoving said platen'roller to and from sald printing bed whlle remaining substanti ally parallel to sand bed, arotary margin bar operable by the means operating said platen roller and adustable means for determining the margln relatlveto an impression on said prlntmg bed.

33. A duplicating machine, com risin a A a 1 2D roller while remainingsubstantially parallel to said bed, a rotary margin bar on said movable means and arranged to be raised and lowered simultaneously with said platen roller and having a lost motion therebetween,

a carria e movable over a arintin bed for applying a sheet thereto, a rotatable platen roller movable toward and from the bed mounted on the carriage for pressing the sheet on the bed, a pressure roller cooperating with the platen roller for controlling the application of the sheet to the bed, a movable margin bar having an abutment portion for engagement with the edge of the sheet to position it and a supporting portion for engaging the lower surface of the front portion of the sheet which is gradually withdrawn from underneath the sheet as the platen roller moves toward the printing bed, and means for so controlling the movement of the margin bar and platen roller that in the movement of the'platen roller away from the printing bed the supporting portion will re main substantially at the same distance from V the axis of the platen roller until the platen roller begins to separate from the pressure roller and wherebythereafter the axis of the platen roller will recedc from said supporting portion and from the axis of the pressure roller to facilitate the insertion of the edge of the sheet and whereby in the movement of the platen roller toward the printing bed the axis of the platen roller will approach the supporting portion until the sheet is gripped between the platen roller and the pressure roller and whereby thereafter as the platen roller is moved toward the printing bed the abutment portion will recede from the edge of the sheet and the supporting portion will be gradually withdrawn from underneath the sheet to permit the front portion of the sheet to engage the printing bed while remaining at substantially the same distance from the axis of the platen roller.

, 35. A duplicator construction comprising a. carriage movable over a printing bed for applying a. sheet thereto, a rotatable platen roller movable toward and from the bed mounted on the carriage for pressing the sheet on the bed, a pressure roller cooperating with the platen roller for controlling the application of the sheet to the bed, a movable margin bar having an abutment portion for engagement with the edge of the sheet to position it and a supporting portion for engaging the lower surface of the front portion of the sheet which is gradually withdrawn from underneath the sheet as the platen roller moves toward the printing bed, means for so controlling the movement of the margin bar and platen roller that in the movement of the platen roller away from the printing bed the supporting portion will remain substantially at the same distance from the axis of the platen roller until the platen roller begins to separate from the pressure roller and whereby thereafter the axis of the platen roller will recede from said supporting portion and from the axis of the pressure roller to facilitate the insertion of the edge of the sheet and whereby in the movement of the platen roller toward the printing bed the axis of the platen roller will approach the supporting portion until the sheet is gripped between the platen roller and the pressure roller and whereby thereafter as the platen roller is moved toward the printing bed the abutment portion will recede from the edge of the sheet and the supporting portion will be gradually withdrawn from underneath the sheet to permit the front portion of the sheet to engage the printing bed while remaining at substantially the same distance from the axis of the platen roller, and means for controlling the rotation of the platen roller during that part of its movement in which the sheet is gripped between the platen roller and the pressure roller. r

36. A duplicator comprising a carriage mounted to travel back and forth over a flat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer surface, a margin bar having a stop for engaging the edge of the sheet to position it, bearing means mounted to swing about an axis substantially coaxial with said bearing frame, said margin bar being rockably mounted on said bearing means, and means controlling the rocking movement of the margin bar as the bearing means swing.

37. A duplicator comprising a carriage mounted to travel back and forth over a flat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as is moved toward the transfer surface, a margin bar having a stop vfor engaging the edge of the sheet to position it, bearing means mounted to swing about an axis substantially coaxial with said bearing frame, said margin bar being rockably mounted on said bearing means, means controlling the rocking movement of the margin bar as the bearing means swing, and means whereby depression of the bearing frame for the platen roller causes the platen .roller to be held against rotation in its bearings and to engage the sheet and press it against the pressure roller so that the sheet is. held against slippage on the platen roller and is thereafter advanced by the downward rocking movement of the bearing frame and whereby the swinging bearing means are operated and the margin bar is caused to swing about the axis of the platen roller to move the margin bar stop faster-than the paper edge is advanced by the downward movement of the bearing frame so as to releasethe paper edge when the platen roller has reached substantially its lowest position. 1'

38. A duplicator comprising a carriage mounted to travel back and forth over a flat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relationwith respect to the'transfer surface, a pressure roller cooperating with said platen-roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer surface, a margin bar having a stop for engaging the edge of the sheet .to position it, bearing means mounted to swing about an axis substantially coaxial with said bearing frame, said margin bar being rockably mounted on said bearing means, means controlling the rocking movement of the margin bar as the bearing means swing, and means whereby depression of the bearing frame for the platen roller causes the platen roller to be held against rotation in its bearings and to engage the sheet and press it against the pressure roller so that the sheet is held against slippage on the platen roller and is thereafter advanced by the downward rocking movement of the bearing frameand whereby the swinging bearing means are operated and the margin bar is caused to swing about the axis of the platen rollerto move the margin bar stop faster than the paper edge is advanced by the downward movement of the bearing frame so as to release the paper 7 edge when the platen roller has reached substantially its lowest position, said bearing "frame for the platen roller having a lost motion with respect to the bearing means for the margin bar to permit the platen roller to mounted to travel back and forth over a flat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved bythe lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer suface, a margin bar having a stop for engaging the edge of the sheet to position it,bearing means mounted to swing about an axis substantially coaxial with said bearing-frame, said margin bar being rockably mounted on sald bearing means,.means controlling the rocking movement of the margin bar as the bearing means swing, and means whereby depresslon of the bearlng frame for the platen roller causes the platen roller to be held against rotation in its bearings and to engage the sheet and press t against the pressure roller so that the sheet 15 held against slippage on the platen roller-- and is thereafter advanced by the downward rocking movement of the bearing frame and 7 whereby the swinging bearing means are operated and'theina-rgin bar is caused to swing about the axis of the platen roller to move the margin bar stop faster than the paper edge is advanced by the downwardmovement of the bearing frame so as to release the paper edge when the platen roller has reached substantially its lowest position, and means for holding the platen roller against rotation comprising a rock member plvotally mounted on the bearing frameand having a pair of gripping projections, said platen roller having a flange extending between said grlpp ng pro-' jections; v I

40. A duplicator comprlsing a carriage mounted to travel'back and forth over a fiat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearlng frame rockably mounted on SilldCElI'IIELgQ, a-platen 'roller'mounted on saidbearing frame and KOJ ing frame, said margin bar being rockably mounted on said bearing means, means controlling the rocking movement of the margin bar as the bearing means swing, means whereby depression of the bearing frame for the platen roller causes the platen roller to be held against rotation in its bearings and to engage the sheet and press it against the pressure roller so that the sheet is held against slippage on the platen roller and is thereafter advanced by the downward rocking movement of the bearing frame and whereby the swinging bearing means are operated and the margin bar is caused to swing about the axis of the platen roller to move the margin bar stop faster than the paper edge is advanced by the downward movement of the bearing frame so as to release the paper edge when the platen roller has reached substantially its lowest position, the means for holding the platen roller against rotation comprising a rock member pivotally mounted on the bearing frame and having a pair of gripping projections, said platen roller having a flange extending between said gripping projections, and means on the carriage for engaging said rock member when the platen roller is in its lowermost position to cause the gripping fingers to release the flange of the platen roller to free it for rotation.

41. A duplicator comprising a carriage mounted to travel back and forth over a flat transfer surface, a handle for moving said carriage back and forth and having a lost motion connection therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer surface, a margin bar having a stop for engaging the edge of the sheet to position it, bearing means mounted to swing about an axis substantially coaxial with said bearing frame, said margin bar being rockably mounted on said bearing means, means controlling the rocking movement of the margin bar as the bearing means swing, means whereby depression of the bearing frame for the platen roller causes the platen roller to be held against rotation in its bearingsand to engage the sheet and press it against the pressure roller so that the sheet is held against slippage on the platen roller and is thereafter advanced by the downward rocking movement of the bearing frame and whereby the swinging bearing means are operated and the margin bar is caused to swing about the axis of the platen roller to move the margin bar stop faster than the paper edge is advanced by the downward movement of the bearing frame so as to release the paper edge when the platen roller has reached substantially its lowest position,

the means for holding the platen roller against rotation comprising a rock member pivotally mounted on the bearing frame and having a pair of gripping projections, said platen roller having a flange extending between said gripping projections, means on the carriage for engaging said rock member when the platen roller is in its lowermost position to cause the gripping fingers to release the flange of the platen roller to free it for rotation, and a member on the carriage 1 ing frame rockably mounted on said carriage,

a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer surface, a margin bar having a stop for engaging the edge of the sheet to position it, bearing means mounted to swing about an axis substantially coazn'al with said bearing frame, said marginbar being rockably mounted on said bearing means, and link means controlling the rocking movement of the margin bar as the hearing means swing.

43. A duplicator construction comprising a carriage mounted to travel back and forth over a flat transfer surface, a handle for mov-= ing said carriage back and forth and having a lost motion connected therewith, a bearing frame rockably mounted on said carriage, a platen roller mounted on said bearing frame and moved by the lost motion of the handle into and out of cooperative relation with respect to the transfer surface, a pressure roller cooperating with said platen roller, said platen roller being spaced from said pressure roller in its raised position and movable into engagement therewith as it is moved toward the transfer surface, a margin bar having a stop for engaging the edge of the sheet to position it, bearing means mounted to swing about an axis substantially coaxial with said bearing frame, said margin bar being rockably mounted on said bearing means, and lock means whereby depression of the hearing frame for the platen roller causes the platen roller to be held against rotation in" its bearings and to engage the sheet and press it against the pressure roller so that the sheet is held against slippage on the platen roller and is thereafter advanced by the downward rocking movement of the bearing frame and whereby the swinging bearing means are operated and the margin bar is caused to swing about the axis of the platen roller to move the margin bar stop faster than the paper edge is advanced by the downward movement of the bearing frame so as to release the paper edge when the platen roller has reached substantially its lowest position.

In witness whereof, I have hereunto subscribed my name.

LOUIS J. SAUER.

CERTIFICATE OF CORRECTION.

-I.'atent ,No. 1,869,508. August 2, 1932.

LOUIS J. SAUER.

It is hereby certified that error appears in the printed specification of the a above numbered patent requiring correction as follows: Page 10, line 112, claim 43, for "connected" read connection; and that the said Letters Patent should be mead with this correction therein that the same may conform to the record of the case in the Patent Office,

Signed and sealed this 18th day of October, A. D. 1932.

M. J. Moore, (Seal) Acting Commissioner of Patents. 

